Please clean the work surfaces before you leave to maintain a hygienic environment.

Although he smiled, there was a sadness beneath the surface.

In the lecture, the professor illustrated how minimal surfaces arise in soap films spanning wireframes.

Riemann surfaces provide a natural setting to study complex analytic functions with branching behavior.

When mapping the electric field around the charged conductor, the physicist drew several equipotential surfaces to visualize regions of constant potential.

Maintenance crews inspected the heating surfaces to ensure efficient heat transfer and prevent corrosion.

During the inspection, the engineer found corrosion below the surface of the pipeline that wasn't visible from above.

Architects used developable surfaces to design the metal panels that would be formed without stretching.

Engineers studied the patterns of surface runoffs after the heavy rains to design better drainage systems.

Her surface-level comments ignored the deeper issues the team was facing.